cre.ations.net has posted
instructions on how you can run SOCKS on a jailbroken iPhone, making it technically possible to tether your laptop to an iPhone and access the internet via Cingular's EDGE network.
Personally, the performance I usually get on the EDGE network is worse than dial-up, but I
can think of occasions where I don't have wifi access and it would be nice to be able to do this.
Though most of the time, I'd probably just use my iPhone. It's got my email, web access, etc. already!
Click here to learn how...